Hoist cable retainer



Aug. 23, 1960 F. o. LUENBERGER HOIST CABLE RETAINER 2 Sheets-Sheet 1Filed Jan. 8, 1957 fww 41m) Aug. 23, 1960 F. o. LUENBERGER HOIST CABLERETAINER 2 Sheets-Sheet 2 Filed Jan. 8, 1957 flame/6K 0. lam/amaze wwwHOIST CABLE RETAINER Frederick 0. Luenberger, Los Angeles, Calitl,assignor to US. Electrical Motors, Inc., Los Angeles, C'alifi, acorporation of California Filed Jan. 8, 1957, Ser. No. 633,108 1 Claim.(Cl. 24-238) This invention rel-ates to hoisting equipment, and moreparticularly to a device for ensuring that the flexible rope or cable isprevented from slipping off from the lifting lug when a slack occurs.

It is one of the objects of this invention to provide a simple andelfective device for accomplishing this purpose, and that can be readilyinstalled.

This invention possesses many other advantages, and has other objectswhich may be made more clearly apparent from a consideration of severalembodiments of the invention. For this purpose, there are shown a fewforms in the drawings accompanying and forming part of the presentspecification. These forms will now be described in detail, illustratingthe general principles of the invention; but it is to be understood thatthis detailed description is not to be taken in a limiting sense, sincethe scope of the invention is best defined by the appended claim.

Referring to the drawings:

Figure 1 is an elevation showing the use of the invention in connectionwith a vertical electric motor;

Fig. 2 is an enlarged fragmentary side elevation thereof;

Fig. 3 is an enlarged sectional view of the form of the invention shownin Fig. 2; and

Fig. 4 is a detail view, illustrating another form of one of theelements used in the invention.

Heavy apparatus such as a vertical electric motor 1 is often providedwith means for applying hoisting slings. In this instance, a cover 6 forthe motor has integral lugs 2 for the accommodation of hoisting cablesor ropes 3. Such lugs are diametrically oppositely arranged on the cover6, and have downwardly directed hook extensions 14 extending in spacedrelationship to the cover to form downwardly opening spaces for thecorresponding slings 3.

In the event a rope sling should become loose, as by relieving the loadthereon, the sling 3 may accidentally slip out from underneath theextension of the lugs 2. In order to prevent this accidental occurrence,a retainer pin 4 is provided for each lug 2, and urged to the retainingposition of Fig. 3 by gravity. The pin extends below lug 2 substantiallyto close the opening of the space formed by extension 14. Thus the pinobstructs the downward movement of the sling 3 below the lug 2.

States Patent The pin is slidably accommodated in a bore 5 slantingdownwardly and formed in the top cover member 6 of the motor 1. In orderto provide a relatively long guide, a corner of the member 6 is filledin as indicated at 7 (Fig. 3).

In order to limit axial movement of the retainer pin 4, spring rings 8and 9 are accommodated in grooves near the end of the retainer pin 4.The spring rings 8 and 9 cooperate respectively with the flat surfaces10 and 11 located internally and externally of the member 6.

When it is desired to remove the sling 3 from the lugs 2 after theapparatus 1 has been deposited in the desired place, the pin 4 may bepushed inwardly out of the way of the cable or rope sling 3. The phantomline position of Fig. 3 shows this inward position.

Instead of using the spring rings 8 and 9 as a limiting element, a taperpin 12 (Fig. 4) may be used. In other respects, the retainer pin 13 hasthe same configuration as the retainer pin 4.

The inventor claims:

In combination: a casing member having an exterior wall, said membercarrying a lifting lug; said lug extending in spaced relationship fromand along the exterior surface of said wall to form therewith adownwardly opening space for a flexible lifting element; a retainer pinslidably supported by and passing through the wall, said wall beingthickened to provide an extended guide for said pin, said pin beingsupported entirely by said guide, said pin sloping downwardly in adirection exteriorly of the wall, whereby gravity determines a stableposition of said pin in which said pin projects substantially across theopening of said space; and means determining opposed limits to thesliding movement of the pin, said pin at one limited position preventingaccess to said space and at said opposite limited position permittingaccess to said space, whereby at said one position the flexible elementis retained in said space, and at said opposite limited position saidflexible element may be removed from or placed into said space, said pinthroughout its limits of movement being maintained in sliding engagementwith said wall and against separating movement with respect thereto.

References Cited in the file of this patent UNITED STATES PATENTS 1112,635 Robinson Mar. 14, 1871 330,991 Mathews Nov. 24, 1885 1,728,930Grant Sept. 24, 1929 1,729,940 Hinderliter Oct. 1, 1929 1,798,403Djidich Mar. 31, 1931 2,333,925 Grossett Nov. 9, 1943 2,704,681 FischerMar. 22, 1955 2,764,048 Thompson Sept. 25, 1956 FOREIGN PATENTS 100,257Germany Dec. 15, 1898 246,714 Great Britain Feb. 26, 1926

